摘要:
A method of modifying a turbine nozzle area comprises depositing a thermal barrier coating (TBC) on the nozzle endwalls to provide a minimum nozzle area, evaluating an airflow through the nozzle, and machining the TBC to increase the nozzle area. Adjacent segment area variation may be minimized, improving engine reliability by reducing the aerodynamic excitation to the down stream blade.
摘要:
A foot and knee protecting device includes a first pad having a curved area to receive a toe portion of a user's shoe; a second pad having a second curved area to receive a knee of the user; and a support extending between the first pad and the second pad, the support to secure around a leg of the user; the first pad and the second pad prevent the toe portion of the user's shoe and the knee of the user from coming into contact with a ground surface when the user is in a kneeled down position.
摘要:
A video compression system and method to isolate and capture video data for video compression, thereby eliminating the need for motion vectors and blocks. When data is captured from a video input device, such as a video camera, the data is captured and isolated into clusters of difference image data. The clusters are then scanned, filled, marked, split and blended in in order to compress the video data.
摘要:
Compounds represented by formula I: or pharmaceutically acceptable salts and solvates thereof, wherein A, B, B′, X, Y, R1, R1′, R2, R2′, R3, R3′, R5, R5′, R6, m, n, or p are as defined herein, are useful for treating flaviviridae viral infections.
摘要:
A new and distinct variety of Mentha canadensis (‘Metolius’) is characterized by its unique oil chemistry and flavor profile resembling that of peppermint oil, and by its tolerance to Verticillium wilt (Verticillium dahliae) and mint rust (Puccinia menthae). DNA microsatellite marker analysis has shown that ‘Metolius’ is a distinct variety of M. canadensis.
摘要:
The present invention includes an electronic test instrument system, an electronic test instrument, a mobile device and associated methods for testing and interfacing with a system under test. The electronic test instrument system includes an electronic test instrument, a wireless coupler, and a mobile device connectable to the electronic test instrument and adapted to control the electronic test instrument. The mobile device includes a user interface that can by dynamically configurable to permit interfacing with and control of various electronic test instruments in series or substantially simultaneously. The electronic test instrument can be adapted to communicate a set of configurable command controls to the mobile device, such that the identify and control parameters of the electronic test instrument are automatically received by the mobile device.
摘要:
Methods are provided for modifying an airfoil internal cooling circuit that include a flow path configured to direct air through the airfoil in a direction and the airfoil having a leading edge, a trailing edge, and a first and a second wall therebetween, each wall having an inner and an outer surface, the inner surfaces defining a cavity and having features forming at least a portion of the internal cooling circuit. The methods may include the steps of forming a pilot hole through the airfoil first and second walls at a predetermined location, forming an insert hole based on the predetermined location, the insert hole enveloping the pilot hole and configured to receive at least a portion of an insert configured to modify the internal cooling circuit flow path, placing the insert into the insert hole, and bonding the insert to the airfoil first and second walls.
摘要:
An earth-boring bit has a bit body that includes head sections, each having depending bit legs with a circumferentially extending outer surface, a leading side, and a trailing side. A bearing shaft depends inwardly from each of the bit legs for mounting a cutter. The bit includes a beveled surface formed at a junction of the leading side and the outer surface of each bit leg. The beveled surface is angled relative to a radial plane emenating from the axis of the bit. The angle of the beveled surface is at least 20 degrees, and extends to an inner surface of the bit leg. The bit can also have a layer of hardfacing on the leading, trailing and shirttail surfaces of the bit leg. A diversion finger of hardfacing extends circumferentially to direct cuttings.
摘要:
A gas turbine engine is configured to use relatively cool, low pressure air discharged from a low pressure compressor to supply buffer air to lubrication sump seals. The engine is further configured such that the lubrication sump is thermally layered by isolating relatively hot, high pressure compressor air from the sump by utilizing a warm vent mixing cavity, which is located radially between of the hot high pressure compressor air and the cool buffer air, which is located in a buffer cavity between the vent cavity and the sump.